baber/WOPTO huggingface dataset:
Patent GB-508230-A (GB)
Title: Means for regulating two or more electrical quantities
IPC: G01R19/20
Filed: 1938-01-13
Abstract: 508,230. Converting ; automatic control systems. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET, and LAMM, U. Jan. 13, 1938, No. 3010. [Classes 38 (ii) and 38 (iv)] Two or more variables, such as the current and voltage in a converting arrangement, are regulated by means of a circuit comprising two branches, one branch has supplied to it through a rectifier bridge 3 a constant direct current, the other branch has supplied to it through rectifiers 7 and 9 direct currents proportional to the variables to be controlled. A regulator winding 16 is connected in parallel to the two branches and the circuit is such that this winding is traversed by the current difference between the currents in the two branches. The current in the branch containing the rectifiers 7, 9 is determined by the larger of the currents representing the variables. A rectifier element is provided in series with the winding 16 to prevent reverse currents flowing. In the system shown, for the regulation of a converter, the rectifier 7 is fed from a current transformer in the converter circuit and the rectifier 9 is fed from a supply of A.C. which is controlled by means of a saturable inductance 10 in dependence on the voltage in the rectifier circuit. The inductance 10 may also be provided with a winding 12 fed from a source of constant current and a winding 13 fed with current proportional to the load current to give compounding. Where the current representing the variable is already a direct current, it may be introduced into the control circuit as shown in Fig. 2, across a series connected rectifier 19. Specification 459,443 is referred to.
Patent GB-325367-A (GB)
Title: Improvements in or relating to boiler flues, fire tubes or the like
IPC: F23M9/00
Filed: 1929-01-29
Abstract: 325,367. Lindemann, O. Jan. 29, 1929. Baffles.-A helical baffle for the firetubes or other heating tubes of a boiler, drying drum, oven &c. comprises units d having a common helical surface and held together by grooves t and tongues a extending along opposite sides of the unit and central bolts c The units and bolts are of fireproof material. In a Lancashire boiler one or more of the units are arranged at the rear end of the flue to increase the velocity of the gases and prevent deposit of dust.
Patent GB-510446-A (GB)
Title: Improvements in or relating to hangers for photographic film
IPC: G03D13/12
Filed: 1938-02-01
Abstract: 510,446. Clips. KODAK, Ltd., and LUBOSHEZ, B, E. Feb. 1, 1938, No. 3110. [Class 44] [Also in Group XX] A clip for holding photographic film comprises a spring 18 holding a jaw 16 having four fingers 23 pressing against fingers 21 on a jaw 10 carrying a hook 14 by which the clip is suspended. Side pieces 25 hold the jaw 16 laterally. Several clamps may be connected together.
Patent GB-211143-A (GB)
Title: Improvements in thermionic apparatus
IPC: H01J5/30
Filed: 1924-02-07
Abstract: 211,143. Holwech, F. Feb. 7, 1923, [Convention date]. Addition to 206,155. Drawings to Specification. Joint-making packing.-In a thermionic valve of the type described in the parent Specification the parts are made separable by the provision of conically-ground joints, the tightness of which is ensured by valve grease. The grease may consist of a mixture of equal parts of caoutchouc, petroleum jelly, and paraffin. The Specification, as open to inspection under Sect. 91 (3) (a) comprises also joints with plane turned members. This subject-matter does not appear in the Specification as accepted.
Patent GB-1463461-A (GB)
Title: Conveying apparatus
IPC: B66B21/02
Filed: 1975-01-24
Abstract: 1463461 Passenger conveyers O & K ORENSTEIN & KOPPEL AG 24 Jan 1975 [25 Jan 1974] 3258/75 Heading B8A A passenger conveyer comprises parallel outward and return runs disposed in a common horizontal or inclined plane and connected at each end by semicircular direction changing portions. Passengers stand on members 5 which are driven by an inner chain 1 and an outer chain 9. At the turns, the members 5 are released from driving engagement with the chain 9 by the action of a cam surface 5. This acts to lift the member 5 so that a friction drive connection at 22 between the chain 9 and the member 5 is broken. The member 5 is hingedly mounted at 26a (Fig. 4) to allow the above action to take place. The chains 1 and 9 are driven at the same linear speed by the action of gearing 30, 32, 34. In a modification Fig. 1 (not shown), the driving sprockets for the two chains are coaxially disposed, but are connected by a change speed gear.
Patent GB-573747-A (GB)
Title: Writing instrument
IPC: B43K7/02
Filed: 1944-02-22
Abstract: 573,747. Fountain pens. BIRO, L. J. Feb. 22, 1944, No: 3274. [Class 146 (iii)] In a fountain pen having a ball point, the ink reservoir is constituted by a capillary duct. As shown in Fig. 1, a number of capillary tube sections b are arranged longitudinally of the barrel a and are connected by parts 5<1> at the ends so as to form a continuous duct. The open, or air-inlet end 6 of the duct is situated towards the writing-point end of the barrel a. The reservoir is removably mounted in the barrel. In another construction, the ducts may be formed'in the body of the barrel and, in a modification, a cylindrical member has an axial bore or duct and longitudinal grooves on its outer face forming with the barrel additional ducts which are connected at the ends to form the complete reservoir.
Patent GB-178585-A (GB)
Title: Improvements in and relating to electric switching mechanism for electric motor control
IPC: H02P1/28
Filed: 1921-01-26
Abstract: 178,585. British Thomson - Houston Co., Ltd., (General Electric Co.). Jan. 26, 1921. Automatic starters for alternating-current motors.-Motor controllers of the type employed for starting induction motors on reduced voltage and automatically changing over to full voltage are constructed with two electromagnetic switches 12, 13 and a master push-button switch 14. When the push is depressed, the switch 12 makes connection from the motor M to reduced voltage taps of an autotransformer 11 and also connects the energizing coil of the switch 13 to line through an auxiliary contact 24. The switch 13 is mechanically held open by an interlocking bar 23 until such time as the coil 12 is de-energized by the return movement of the lower push contact 16 under the delaying action of a dash-pot 18.
Patent GB-1000472-A (GB)
Title: Improvements relating to the testing of moisture content of tobacco and other loose material
Inventor: GOODFELLOW DAVID SYDNEY
IPC: G01N27/22
Filed: 1962-01-29
Abstract: 1,000,472. Measuring moisture content electrically. BRITISH-AMERICAN TOBACCO CO. Ltd. Jan. 15, 1963 [Jan.29, 1962],No.3307/62. Heading G1N. An apparatus for measuring the moisture content of loose material e.g. tobacco comprises a shaking conveyer 6 composed of a plurality of V shaped channels 9 which merge into channels 10 and guide the material which passes in an even carpet over a measuring head 3 comprising capacitor plates 2 which produce a curved electrostatic field traversed by the tobacco. The speed of a removal conveyer 15 is so adjusted that the depth of the carpet tobacco remains undisturbed during its passage over the measuring head.
Patent GB-712444-A (GB)
Title: Process for the purification of aqueous solutions of acrylic acid nitrile by distillation
Filed: 1952-02-07
Abstract: <PICT:0712444/III/1> Acrylic acid nitrile is purified from divinyl-acetylene and other impurities by subjecting a dilute aqueous solution of the crude nitrile (i.e. a solution containing not more than 5 per cent. of nitrile) to partial evaporation, and causing water or a dilute aqueous solution of the nitrile to flow countercurrent to the vapours, the temperature of the countercurrent stream being maintained below the boiling point of the acrylic acid nitrile/water azeotrope, whereby the divinyl acetylene is removed in the vapours and purified nitrile solution is obtained as distillation-residue.  Before they are contacted with the water, the vapours are preferably diluted with an inert gas such as nitrogen, or a volatile hydrocarbon such as hexane.  Crude nitrile solution, preheated to 50-60 DEG  C., is introduced into the apparatus through inlet B, and flows into Vigreux distillation column A, which is surrounded by a jacket heated by steam at 100 DEG  C.  The solution boils in column A, and inert gas is introduced through capillary L in order to prevent bumping.  The rising vapours are first washed by the countercurrent stream of feed, are next diluted with inert gas introduced through inlet C, and then enter extraction column D, which is packed with Berl saddles and is surrounded by a jacket, through which water at 30 DEG -40 DEG  C. is circulated.  Water at 30 DEG -40 DEG  C. in an amount about equal to one-tenth of the amount of nitrile introduced at B is introduced into column D through inlet M, and flows countercurrent to the vapours, carrying evaporated nitrile back to column A.  Vapours containing volatile impurities leave the top of column D at 35 DEG  C., and are condensed in condenser E. Nitrile solution at 85 DEG -95 DEG  C. leaves the lower end of column A, through an adjustable siphon G, and is passed to column H, where the nitrile is driven out by a countercurrent of steam.  The vapours are condensed, and the condensate is collected in receiver K, where the nitrile separates as an upper layer.  The nitrile may now be fractionated, and obtained in a high state of purity.  In a modification, hexane (instead of inert gas) is introduced dropwise through inlet C, and is evaporated immediately.  In this case column D is maintained at 60 DEG  C. in order to prevent condensation of hexane therein.  In a further modification, the gaseous mixture issuing from the nitrile synthesis tower (wherein acetylene is catalytically reacted with hydrocyanic acid) is introduced directly into the purification apparatus.  In this case, acetylene is used to prevent bumping in column A; and gas leaving the top of column D is returned to the synthesis tower.  A mixture of chlorinated benzenes is added to column A in order to dissolve cyano-butadiene, and to prevent the formation of undesirable polymerization products thereof.
Patent GB-248896-A (GB)
Title: Improvements in or connected with electric cables
IPC: H01B9/06
Filed: 1925-02-06
Abstract: 248,896. British Insulated & Helsby Cables, Ltd., and Nisbett, G. H. Feb. 6, 1925. Cables and conductors, processes for making; insulating coverings for cables and conductors. - In high-tension conductors which are insulated in a covering of paper or like insulating material, ducts are formed on the periphery of the insulation for the purpose of drying it by a current of air or the creation of a vacuum. In the construction shown, the conductor consists of two layers of wire 1 wound about a helical wire support 2. The insulating covering 3 is formed with ducts 4 by spaced cords or strands 5 of paper, hemp, &c. and an additional thin layer 6 of the insulating material.
Patent GB-197369-A (GB)
Title: Improvements in the impregnation of liquids and solutions with soluble gases
IPC: B01F3/04
Filed: 1922-02-06
Abstract: 197,369. Shaw, A. H., and Peachey Process Co., Ltd. Feb. 6, 1922. Gases, absorbing.- Apparatus for use in impregnating liquids or solutions with soluble gases comprises a closed vessel 2 provided with a series of superposed perforated trays, pans, or dishes 4 down through which the liquid may pass in a series of fine streams or a succession of drops, a supply container 1 for the liquid connected to the closed chamber by a pipe 5 terminating therein above the uppermost tray, a collecting receptacle 3 connected to the lower end of the closed vessel by a pipe 9 shaped so as to form a liquid trap, and one or more gas inlets 7 at or towards the lower end of the closed vessel for the admission of gas to replace that absorbed by the liquid.
Patent GB-762290-A (GB)
Title: Improvements in reciprocating hydraulic pumps
Filed: 1954-02-05
Abstract: 762,290. Pistons; stuffing-box substitutes. GRATZMULLER, J. L. Feb. 5, 1954 [Feb. 5, 1953], No. 3454/54. Classes 122 (1) and 122(5). [Also in Group XXVIII] In a reciprocating pump (see Group XXVIII) the piston 21 and/or cylinder 3 has a groove 22 connected through port 24 to the suction reservoir for the liquid supplied to the pump so that the suction head exists in the groove. Specifications 739,930, [Group XXVIII], 762,292 and 762,293, [Group XXVIII], are referred to.
Patent GB-556743-A (GB)
Title: Improvements in or relating to the production of optical lenses and other mouldings in plastics
IPC: B29C43/00
Filed: 1942-03-16
Abstract: 556,743. Moulding lenses, prisms &c., from transparent thermoplastic materials; electric heating; pliers. KINGSTON, A. W. March 16,1942, Nos. 3474/42 and 427/43. [Class 87 (ii)] [Also in Groups XI and XXIII] The workpiece which is to be moulded is preformed by cutting, grinding or like mechanical operations to a shape closely approximating its final shape, and the preform is then moulded between dies. Before moulding the preform may be polished. The preform may be made by cutting a blank from a sheet, turning the blank to a curved surface by means of a cutter in a lathe, and grinding the curved surface, the resulting preform being polished on a rotary buffing machine. The moulding dies and the preform may be of such relative shapes that during the moulding free outlet for air is allowed towards the periphery of the die parts ; thus, the radius of curvature of a convex preform may be slightly less than the radius of curvature of the corresponding die surface, and the radius of a concave preform slightly greater than the. radius of the corresponding die surface. The thermoplastic material may be methyl methacrylate polymer, polystyrene or polyvinyl chloride. The preforms are preheated by being gripped in tongs 27 and inserted into a rheostatcontrolled electric oven 23 mounted on a frame near a moulding press 13. The heated preform is then placed on the lower die 12 which is raised by hydraulic means so that the preform is compressed between the dies 12, 15. At this stage, the dies are heated by contact with jackets 11, 16 connected to steam conduits 20, 22. After moulding, the steam is turned off and the jackets are cooled by means of cold water conduits 19, 21. During cooling, pressure is maintained on the moulded article by means of a spring 18. When the press is opened, the bottom die 12 is lifted out of its surround 10 by means of a pivoted hand-lever 33 connected to the die by a yoke 31 and rod 30. Specifications 416,398, [Group XX], and 544,472 are referred to.
Patent GB-714420-A (GB)
Title: Mechanical printing of daylight fluorescent compositions
IPC: B41M3/06
Filed: 1951-02-13
Abstract: Daylight fluorescent compositions comprise a daylight fluorescent pigment and (1) poly-n-butyl methacrylate and beeswax; (2) polyvinyl chloride, dioctyl phthalate and naphtha; (3) vinyl chloride-vinyl acetate copolymer, dioctyl phthalate and dibutyl phthalate and (4) polyvinyl formal (or a like acetal of polyvinyl alcohol) and ethylene glycol. The poly-n-butyl methacrylate may be replaced by polyethylene and the beeswax by animal, vegetable or mineral waxes, high melting-point alcohols and esters, hydrogenated oils and oil acids and high-melting soaps. Specification 672,763 is referred to.
Patent GB-662159-A (GB)
Title: Improvements in or relating to method and apparatus for removing accretions from thedischarge end of a tuyere
IPC: C21C5/48
Filed: 1949-02-09
Abstract: 662,159. Cleaning converter tuyeres PHELPS DODGE CORPORATION. Feb. 9, 1949. [Feb. 19, 1948] No. 3534/49. Class 72. [Also in Groups XXVIII and XXIX] A blasting effect to remove accretions at the discharge end of a tuyere in metallurgical apparatus, such as a copper converter, is produced by releasing into the tuyere an accumulated volume of gas, such as air, under high pressure. Gas charges may be accumulated and released rapidly in succession, and the gas pressure may be at least 1000 lbs. per sq. inch. The apparatus may comprise an accumulator 22 communicating with the tuyere 14 by a pipe 21 and having a valve 29 connected to a piston 33, a trigger valve 23 and a solenoid 24. Gas is admitted from a pipe 38 to the accumulator via port 36 of the piston and operation of the solenoid causes the valve element 43 to close pipe 38 and open pipe 39 to atmosphere thereby releasing the gas on the left-hand side of the piston which is moved by the gas pressure in the accumulator so that valve 29 is unseated to allow instantaneous discharge of gas into the tuyere. Low-pressure converting air is supplied through conduit 19. In modifications, (1) the gas is released into a space between a jacket and sleeve at the outer end of the tuyere to prevent back-pressure in conduit 19 and (2) the accumulator extends along the converter, is enclosed in a wind box for the converting air and is connected to jacketed tuyeres by pipes the gas inlets of which are controlled by individual valves (see Group XXIX).
Patent GB-209964-A (GB)
Title: Band brakes
IPC: F16D49/08
Filed: 1923-02-06
Abstract: 209,964. Macbride, G. W., and Bonney, G. C. Feb. 6, 1923. Band.-A lining for brake bands, particularly such as are used in connection with the transmission gearing of Ford motor vehicles, is adapted' to be attached and detached for renewal without removing the transmission casing. The lining is in two sections each having a friction surface 22 secured to a backing plate 20 which carries at one end a swivelled channel member 24 and at the other end a stud 39. The outer member 11 of the band is attached to the usual lugs 12 through which passes a rock shaft by which the band is tightened about the drum. To attach a lining section that end thereof which carries the channel member 24 is inserted beneath one end of the band' with the section disposed as indicated in Fig. 7 which shows the three drums of a vehicle transmission gearing. Guided by the member 24 this end of the section is then slid downwards and the section turned on the swivel into position between the drum and the band 11 until a notch 41 in the section engages a stud 42 on the band 11 and the stud 39 can be engaged in a socket 38 in the band. A groove for guiding the stud 39 to the socket may be formed in the and of the lugs 10. In order further to retain the ends of the sections in position, the band 11 may terminate at 37 short of the and of the lugs 10 to provide a seating for an offset part 35 at the end of the lining sections which may also have upturned parts 36 to abut against the lugs. The band 11 is offset &t the part 43 so that the stud 42 may be clear of the drum. The flanges of the channel member 24 may be bent over to engage the outer part of the band 11.
Patent GB-1194094-A (GB)
Title: Improvements in or relating to Solid State Devices for Generating Electromagnetic Waves
Inventor: MIGITAKA MASATOSHI
IPC: H03B9/12
Filed: 1968-01-23
Abstract: 1,194,094. Gunn effect devices. HITACHI SEISAKUSHO K.K. 23 Jan., 1968 [23 Jan., 1967], No. 3546/68. Heading H1K. The efficiency and noise performance of a Gunn effect device are improved by disposing between one of the electrodes and the active part of the semi-conductor body a layer consisting of a mixed crystal of the semi-conductor and another material having a smaller gap between the energy bands of high and low effective mass so that the domains form in the layer and propagate through the body. Although the body may be of indium phosphide or cadmium telluride it is preferred to use high resistivity gallium arsenide in association with layers of GaAs x P 1-x . In a typical device, Fig. 2, the body 1 and layer 10 are disposed between highly doped terminal regions 7, 6 of GaAs provided with nickel contacts 2, 3 but in other embodiments one or other of the terminal regions is omitted. The Fig. 2 device is made by placing a polished 0À007 ohm /cm. tellurium doped gallium arsenide wafer and a gallium wafer containing small amounts of gallium phosphide and arsenide at opposite ends of a graphite boat, heating to 900 C. and tilting so that the molten gallium flows over the arsenide wafer and then slowly cooling to epitaxially deposit GaAs. 9 P. 1 . After etching in HCl to remove residual gallium and grinding, the process is repeated but using a gallium wafer containing only the arsenide to form a 0À01 ohm/cm. GaAs layer. After grinding off superfluous material the faces are nickel plated and the resulting structure subdivided. An alternative form of device is made by epitaxially depositing first 1 ohm/cm. GaAs and then GaAs. 9 P. 1  on the starting wafer from vapours comprising gallium and trichlorides of arsenic and phosphorus. One re-exposed face of the base wafer is then nickel plated, a tin layer vacuum deposited on the mixed crystal layer through a mask and a gold contact soldered to the tin. In a variant of this method the mixed crystal is formed by exposing the epitaxial arsenide layer to phosphorus vapour. In yet another method the mixed crystal is formed by exposing a high resistivity GaAs wafer to phosphorus vapour, after which the terminal GaAs layer is epitaxially deposited from solution in gallium as previously described and contacts formed as in the previous embodiment.
Patent GB-1428306-A (GB)
Title: Method and apparatus for radioimmunoassay
IPC: G21H5/02
Filed: 1974-01-25
Abstract: 1428306 Apparatus for radio-immunoassay M A REUNANEN 25 Jan 1974 [25 Jan 19731 03613/74 Heading B1X [Also in Division G1] Apparatus for use in radioimunoassay comprises a slit-shaped chamber formed between a pair of dialysis membranes 4 disposed in a reaction vessel 1. The membranes may be of cellulose and are seated together at 5. One reaction component may be absorbed into porous sheet 3 of paper for example. Sample to be assayed is then introduced into the vessel 1 to level 7 above the level of the top of the sheet. A plurality of vessels 1 may be mounted in a cassette (10) which has means for oscillating it.
Patent GB-929845-A (GB)
Title: Overload release device for agricultural implements and the like
IPC: A01B61/04
Filed: 1961-01-31
Abstract: 929,845. Agricultural implements. H. MONERIE & CIE. Jan. 31, 1961 [Feb. 2, 1960; May 14, 1960], No. 3674/61. Class 6(1). [Also in Group XXV] A member 2 carrying a ploughing unit A is pivoted at 4 to the ploughbeam 1 and is wedged between a pair of stops 8, 9 on the beam by means of a spring-biased detent comprising two tangentially touching rollers 7a, 7b one of which bears against a ramp formed on the stop 9 while the other bears against the member 2 to hold it in contact with the stop 8. The rollers are carried by a push-rod 5 slidable in guides 2a on the member 2 under the action of a coil spring 6. When the forces tending to turn the member 2 relative to the beam 1 exceed a predetermined limit, e.g. when the ploughshare strikes an obstruction, the roller 7a rides up the ramp against the action of the spring 6 and the member 2 rotates in the anti-clockwise direction. In a modification the detent is fitted on the beam 1 and the stops are carried by the member 2.